How is wastewater cleaned? American Geosciences Institute

Most of the water that is used in homes and businesses is put into either municipal sewers or home septic systems. Most of that water is polluted to some extent, because it comes from clothes washing, bathing, and toilets. In earlier times, sewage was put directly into the ground, into rivers, or into the ocean, without any treatment. As population has grown, however, the need for wastewater treatment has increased as well. Home septic systems consist of a large underground tank, where anaerobic bacteria (those that do not need oxygen) gradually break down most of the solids.

The Energy Lurking In Sewers Could Help Fight Climate Change : NPR

Ariake Water Reclamation Center. The Wastewater Cleaning Process. Reaction Tank.【Adults】

There's a new boom in the Permian Basin — wastewater - High Country News

Global river water quality under climate change and hydroclimatic extremes

Water American Geosciences Institute

Value-Added Products from Natural Gas Using Fermentation Processes: Fermentation of Natural Gas as Valorization Route, Part 1

Water purification, Description, Processes, & Importance

Water American Geosciences Institute

Water American Geosciences Institute

Using Produced Water American Geosciences Institute

Water American Geosciences Institute